红松（ＰｉｎｕｓｋｏｒａｉｅｎｓｉｓＳｉｅｂ．ｅｔｚｕｃｃ．）是我国东北重要的珍贵用材树种，由于每年都被大量采伐，其资源已日趋枯竭。为了迅速恢复红松森林资源，不少地区陆续营造了红松人工林，其中还有一部分被改造为种子林。但是，目前红松幼林有提前开花现象... Pinus koraiensis (Sip.etzucc.) Is an important species of precious timber in northeastern China. Due to the annual harvesting, its resources have been depleted. In order to quickly restore the resources of Korean pine forest, many areas have successively built Korean pine plantations, of which some have been transformed into seed forests. However, at present, there is a phenomenon of early flowering of Korean pine forest ...